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Energy is an alternative resource system that debuted in the set Kaladesh in 2016 (damn it's scary to think that Kaladesh released almost a decade ago)
On top of that, this card also has gameplay utility as in its less rare version, Iron Leaves ex has been included in decks such as the Arceus VSTAR/Giratina VSTAR and Lost Zone Box decks
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Decision is a fun card to bargain with in certain matchups, but it always serves you well against other control lists as long as you target the right spells and dont let yourself get your own spells countered by your opponents votes